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of 26
pro vyhledávání: '"Nándori, István"'
The critical behaviour of the classical (thermal) phase transition (CPT) of the Ising model is identical to the quantum phase transition (QPT) of the $\phi^4$ Quantum Field Theory (QFT). Our goal in this work is to map out the QPT-CPT diagram of the
Externí odkaz:
http://arxiv.org/abs/2407.20704
Time-evolution of the Universe as described by the Friedmann equation can be coupled to equations of motion of matter fields. Quantum effects may be incorporated to improve these classical equations of motion by the renormalization group (RG) running
Externí odkaz:
http://arxiv.org/abs/2405.07846
Autor:
Nandori, Istvan
The goal of this Thesis is to give a presentation of some key issues regarding the non-perturbative renormalization of the periodic scalar field theories. As an example of the non-perturbative methods, we use the differential renormalization group ap
Publikováno v:
Phys. Rev. D 101, 063533 (2020)
We investigate a particle physics model for cosmic inflation based on the following assumptions: (i) there are at least two complex scalar fields; (ii) the scalar potential is bounded from below and remains perturbative up to the Planck scale; (iii)
Externí odkaz:
http://arxiv.org/abs/1911.07082
Publikováno v:
Phys. Rev. Lett. 123, 100601 (2019)
We study the effect of a linear tunneling coupling between 2D systems, each separately exhibiting the topological Berezinskii-Kosterlitz-Thouless (BKT) transition. In the uncoupled limit, there are two phases: one where the 1-body correlation functio
Externí odkaz:
http://arxiv.org/abs/1907.06253
Autor:
Jentschura, Ulrich D., Nandori, Istvan
Publikováno v:
Phys.Rev.A 97 (2018) 042502
Recently, a peak in the light fermion pair spectrum at invariant q^2 approximately equal to 16.7 Me^2. has been observed in the bombardment of Li-7 by protons. This peak has been interpreted in terms of a protophobic interaction of fermions with a ga
Externí odkaz:
http://arxiv.org/abs/1804.03096
Autor:
Jentschura, Ulrich D., Nandori, Istvan
Publikováno v:
Advances in High Energy Physics 2017 (2017) 9850312
The emission of a charged light lepton pair by a superluminal neutrino has been identified as a major factor in the energy loss of highly energetic neutrinos. The observation of PeV neutrinos by IceCube implies their stability against lepton pair Cer
Externí odkaz:
http://arxiv.org/abs/1711.02660
Publikováno v:
J.Phys.G 44 (2017) 105201
We consider in detail the calculation of the decay rate of high-energy superluminal neutrinos against (charged) lepton pair Cerenkov radiation (LPCR), and neutrino pair Cerenkov radiation (NPCR), i.e., against the decay channels nu -> nu e+ e- and nu
Externí odkaz:
http://arxiv.org/abs/1709.07711
Publikováno v:
Phys. Rev. B 96, 174505 (2017)
The study of the Berezinskii-Kosterlitz-Thouless transition in two-dimensional $|\varphi|^4$ models can be performed in several representations, and the amplitude-phase (AP) Madelung parametrization is a natural way to study the contribution of densi
Externí odkaz:
http://arxiv.org/abs/1706.00618
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